Adhesion Behavior of Microorganisms Isolated from Soil on Hydroxyapatite and Other Materials

Kamitakahara, Masanobu; Takahashi, Shohei; Yokoi, Taishi; Inoue, Chihiro; Ioku, Koji

doi:10.1007/s12010-018-2861-9

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…Conventional electret fillers, such as silicon dioxide and barium titanate, , allow increased filtration performance but are overwhelmingly limited by poor biocompatibility and nondegradability. The employment of the hydroxyapatite bioelectret (HABE) as a charge enhancer in the PLA fibrous membrane permits the exploitation of the charge storage capacity and improves the filtration performance, , favorably facilitating the biocompatibility and biodegradation of the membrane filters. , In combination with controlled dispersion of HABE in PLA spinning solution, it is assumed to generate protrusions at fiber surfaces to increase the filtration efficiency by providing contact sites and reduce air resistance by the slip effect.…”

Section: Introductionmentioning

confidence: 99%

Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

Tang

Jiang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Despite the great potential in fabrication of biodegradable and eco-friendly air filters by electrospinning poly(lactic acid) (PLA) membranes, the filtering performance is frequently dwarfed by inadequate physical sieving or electrostatic adsorption mechanisms to capture airborne particulate matters (PMs). Here, using the parallel spinning approach, the unique micro/nanoscale architecture was established by conjugation of neighboring PLA nanofibers, creating bimodal fibers in electrospun PLA membranes for the enhanced slip effect to significantly reduce the air resistance. Moreover, the bone-like nanocrystalline hydroxyapatite bioelectret (HABE) was exploited to enhance the dielectric and polarization properties of electrospun PLA, accompanied by the controlled generation of junctions induced by the microaggregation of HABE (10–30 wt %). The incorporated HABE was supposed to orderly align in the applied E-field and largely promote the charging capability and surface potential, gradually increasing to 7.2 kV from the lowest level of 2.5 kV for pure PLA. This was mainly attributed to HABE-induced orientation of PLA backbone chains and CO dipoles, as well as the interfacial charges trapped at the interphases of HABE–PLA and crystalline region–amorphous PLA. Given the multiple capturing mechanisms, the micro/nanostructured PLA/HABE membranes were characterized by excellent and sustainable filtering performance, e.g., the filtration efficiency of PM0.3 was promoted from 59.38% for pure PLA to 94.38% after addition of 30 wt % HABE at a moderate airflow capacity of 32 L/min and from 30.78 to 83.75% at the highest level of 85 L/min. It is of interest that the pressure drop was significantly decreased, mainly arising from the slip effect between the ultrafine nanofibers and conjugated microfibers. The proposed combination of the nanostructured electret and the multistructuring strategy offers the function integration of efficient filtration and low resistance that are highly useful to pursue fully biodegradable filters.

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Section: Introductionmentioning

confidence: 99%

Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

Tang

Jiang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Kamitakahara et al. examined adherence of microorganisms on different materials, carbon coated material was more suitable for adhering microorganisms than poly vinyl chloride and polyurethane [ 23 ]. Also, a comparison of different materials showed that activated carbon fabric has the best adsorption properties for strong attachment of Shewanella oneidensis [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Improving adsorption effect of modified carbon felt on microorganisms in pig houses

Zhao¹,

Fei²,

Li³

et al. 2022

Heliyon

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Effect of Oxidation Treatment and UV Irradiation of Titanium Surface on Yeast Adhesion

Umetsu,

Sekiai,

Chien

et al. 2023

Preprint

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Support materials capable of immobilizing microorganisms, such as yeast, are important for developing bioreactors for producing useful substances and wastewater treatment. However, the intricacies of initial microorganism adhesion remain unclear owing to the complex interactions among physicochemical properties of the material and microbial cell surfaces. Therefore, this study was undertaken to elucidate the effects of changes in the physicochemical properties of oxidized titanium surfaces on yeast adhesion. Surface-oxidized titanium was selected as a biocompatible material anticipated to serve as a support material for yeast. The titanium surface properties were controlled through oxidation and UV irradiation treatments, and their effects on yeast adhesion were evaluated. The application of heat treatment or anodic oxidation to polished titanium led to a significant increase in the number of adherent yeast, particularly on the anodic-oxidized titanium surface. This observation suggests that anodic oxidation is the preferred method for enhancing yeast adhesion. Despite the known significance of surface hydrophilicity in microbial adhesion, no correlation was observed between hydrophilicity and yeast adhesion in this study. UV irradiation increased the surface free energy of oxidized titanium; however, the surface free energy of polished, heat-treated titanium when immersed in yeast extract-peptone-dextrose medium decreased owing to the adsorption of medium components. In contrast, anodic-oxidized titanium maintained its hydrophilicity and surface free energy after immersion, although it adsorbed more culture medium components than the other titanium samples. Surface characterization of the adsorption layer may provide a more comprehensive understanding of microbial adherence.

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Adhesion Behavior of Microorganisms Isolated from Soil on Hydroxyapatite and Other Materials

Cited by 3 publications

References 31 publications

Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

Improving adsorption effect of modified carbon felt on microorganisms in pig houses

Effect of Oxidation Treatment and UV Irradiation of Titanium Surface on Yeast Adhesion

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